Bump go to v1.21.6 and set a single source of truth (#10926)

.github/workflows/ci.yaml

@@ -78,11 +78,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       
+      - name: Get go version
+        run: echo "GOLANG_VERSION=$(cat GOLANG_VERSION)" >> $GITHUB_ENV
+        
       - name: Set up Go
         id: go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: '1.21.5'
+          go-version: ${{ env.GOLANG_VERSION }}
           check-latest: true
 
       - name: Run test
@@ -92,6 +95,8 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     needs: changes
+    outputs:
+      golangversion: ${{ steps.golangversion.outputs.version }}
     if: |
       (needs.changes.outputs.go == 'true') || (needs.changes.outputs.charts == 'true') || (needs.changes.outputs.baseimage == 'true')
      
@@ -100,12 +105,17 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      
+      - name: Get go version
+        id: golangversion
+        run: |
+          echo "version=$(cat GOLANG_VERSION)" >> "$GITHUB_OUTPUT"
 
       - name: Set up Go
         id: go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: '1.21.5'
+          go-version: ${{ steps.golangversion.outputs.version }}
           check-latest: true
 
       - name: Set up QEMU
@@ -177,7 +187,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: '1.21.5'
+          go-version: ${{ needs.build.outputs.golangversion }}
           check-latest: true
 
       - name: Install Helm Unit Test Plugin

.github/workflows/golangci-lint.yml

@@ -18,11 +18,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       
+      - name: Get go version
+        run: echo "GOLANG_VERSION=$(cat GOLANG_VERSION)" >> $GITHUB_ENV
+      
       - name: Set up Go
         id: go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: '1.21.5'
+          go-version: ${{ env.GOLANG_VERSION }}
           check-latest: true
       
       - name: golangci-lint

.github/workflows/images.yaml

@@ -142,15 +142,19 @@ jobs:
       (needs.changes.outputs.kube-webhook-certgen == 'true')
     strategy:
       matrix:
-        k8s: [v1.25.11, v1.26.6, v1.27.3, v1.28.0, 1.29.0]
+        k8s: [v1.25.11, v1.26.6, v1.27.3, v1.28.0, v1.29.0]
     steps:
     - name: Checkout
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+    - name: Get go version
+      run: echo "GOLANG_VERSION=$(cat GOLANG_VERSION)" >> $GITHUB_ENV
+
     - name: Set up Go
       id: go
       uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
       with:
-        go-version: '1.21.5'
+        go-version: ${{ env.GOLANG_VERSION }}
         check-latest: true
     - name: image build
       run: |

.github/workflows/plugin.yaml

@@ -16,10 +16,13 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Get go version
+        run: echo "GOLANG_VERSION=$(cat GOLANG_VERSION)" >> $GITHUB_ENV
+
       - name: Set up Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: '1.21.5'
+          go-version: ${{ env.GOLANG_VERSION }}
           check-latest: true
 
       - name: Run GoReleaser Snapshot